Sorry for the delay in answering. My site only lists the products that have been produced by ICE, I don’t actually offer them up for sale here. I do plan to make an enhancement in the future that will include links to locations where the products can be purchased, but I haven’t done that yet.
Specifically regarding the HARPer’s Grimoire, I think that product might not be available at the moment, but if you post the question at the ICE Forums ( http://www.ironcrown.com/ICEforums/index.php?action=register;referredby=49 ) you may get an official answer on that

I’m trying to get a copy of the HARPer’s Grimoire, but I can’t figure out how. No link appears to allow me to add to a shopping cart, and there’s nothing I can find to link to it. What am I doing wrong?